A Battleground of Love Across Past and Present Lives

At long last, he finds the reincarnation of the man he loved in his previous life, only for his present-day self to suddenly get jealous of his past self; At long last, his present-day self stops getting jealous, only for his past self to suddenly transmigrate into the present; Just as his past and present selves are beating each other senseless, Present self: Do you love me or him? The bottom: ┑(￣Д ￣)┍ Aren't you and he the same person?! Past self: The present you have in mind isn't my future self. The bottom: o_O??? Past self: You've got the wrong person. The bottom: w(°Д°)w Also known as: "Past and Present Selves Want to Kill Each Other Every Day," "Disaster! The Man I've Pursued for Centuries Isn't My Man!" and "Wait! There's Still Time to Save This!" P.S. One-on-one romance.